Guy derrick



Dec. 16, 1947. R. o. LlvELY 2,432,528

GY 15ERRICK DCC. 16, 1947. u R Q LNELY 2,432,528

GUY DERRICK Filed Aug. 9, 1944 3 sheets-sheet 2 R. O. LVELY GUY DERRICK Dec. 16, 1947.

Filed Aug. 9, 1944 3 Sheets-Sheet 3 Patented Dec. 16, 1947 UNITED STATES PATENT OFFICEi 6 Claims.

This invention relates to new and useful improvements in derricks, and more particularly to a guy derrick such as is employed on high building construction and moved from one floor level upwardly to the next as work progresses.

At present, considerable time and manual efforts are consumed in raising a conventional derrick from one iloor level upwardly to the next. There is much dismantling and hoisting of parts and the ever present danger of personal injury to workmen.

The principal object of the present invention is to reduce the engineering requirements in jumping a. derrick from one floor level to another.

Another important object of the invention is to provide a derrick having an extensible mast section which can be elevated to an overlying floor level on a building construction and secured in place at the new level, after which the remaining part of the mast and the boom are elevated by means complemental to the elevated section, until the entire assembly is jumped to the new level where it can be adequately secured in place.

Various other important objects and advantages of the invention shall become apparent to the reader of the following description.

In the drawings:

Figure 1 is a fragmentary side elevational View with a portion in section showing the improved derrick before it is jumped upwardly to the next iloor level.

Figure 2 is a fragmentary side elevational view, partly in section, showing the outer section oi the mast after it has been elevated to the new iloor level and preparatory to lifting the inner mast section along with the boom.

Figure 3 is a vertical sectional view through the derrick.

Figure 4 is a sectional view taken substantially on line 4 4 of Figure 3.

Figure 5 is a cross sectional view taken substantially on line 5--5 of Figure 3.

Figure 6 is a top plan view of the cribbing erected on the upper oor level of the building structure to support the outer mast section in place for the raising of the inner mast section, the telescoped mast sections being shown in cross section.

Figure 7 is a side elevation of the structural assemblyof Figure 6.

Referring to the drawings wherein like nu morals designate like parts, it can be seen that numeral 5 denotes the upright steel beams of a building construction, while reference numerals 6, I represent the horizontal beams of two oor levels.

The derrick proper is generally referred to by numeral 8, and as shown in Figure 1is resting at the iioor level 6. Crlbbing or supporting beams 9 are suitably disposed on the construction beams 6 and these serve to support plates I il, I0, the opposed ends of which are shaped to form hemispherical-shaped shells I I, iianged, as at I2, and bolted together, as at I3.

I4, open at its bottom to match an opening in the bottoms of the sockets II, I I. The ball I4 is connected by a neck I5 to a base IS from which rises a mast generally referred to by numeral I'I. Pivotally secured to the base I6, as at I8, is a boom generally referred to by numeral I9.

The boom I9 may be constructed of welded elongated plates 20 for its full length, or may be interrupted or entirely constructed of steel beams 2I provided with spreaders 22 and brace means 23. In order to lighten the upper portion of the boom, it may be desirable to have this open construction at the upper end only, as best shown in Figure 1.

At the upper end of the boom I9 is a clevis 24 supporting a sheave 25.

A cable 26 extends downwardly to a sheave 2'I carrying a material-handling hook or the like 28, and then upwardly over the sheave 25 and a small pulley wheel 29 supported by the upper end of the boom I9. From there the cable 2G extends downwardly about a pulley 3Q mounted on a bracket 3| at the lower end of the mast I'I. The cable 26 then extends through an opening 32 in the Wall of the mast, passes over a pulley wheel 33 mounted within the lower portion of the mast and then downwardly through the ball and socket support I4, II, the base I6 having a passageway for all cables extending below the derrick.

The mast I'I consists of two main parts, namely, an inner section 34 and an outer section 35. The inner section 34 tapers downwardly at its lower portion and is adequately secured to the base I6.

Just above the base I6, the lower tapered portion Y of the inner section'34 has an angle member or shelf 36 secured thereto and serving as a top for the lower end of the outer section 35.

The upper portion of the inner section 34 is tapered and the upper portion of the outer section 35 is likewise tapered.

, As `can be seen in Figure 3, a pin 31 rises from These shells together' denne a socket for the reception of a hollow ball the upper end of the mast section and supports a disc 38 apertured at its peripheral portion to receive the upper ends of guy lines 39 which extend outwardly to engage pulleys lill on portions of the building construction and then downwardly to crabs or anchoring means at convenient places on the building construction, this being so that lwhen it is desired to elevate the derrick structure, these guy lines can be released at the point where the lifting power for control mast is located.

A bracket @i is provided on the upper portion of the outer mast section er and supports a sheave 62. A cable Ils extends from this point out to the upper end of the boom I9, over a sheave lll carried by the upper end of the boom and which in turn is supported by a elevis Q5, and then backwardly and over from where it extends downwardly and under the sheave 3] and over the pulley 53 after passing through the opening 32 in the lower portion of the mast section 3d. This cable t3 also extends downwardly through the base IB and ball and socket support lll, il.

A bracket d depends within the upper portion of the outer mast section 35, supporting a shea-ve 47 A cable e5 anchored to the upper end of the inner mast section 3d extends upwardly and over the shea-ve ll and then downwardly between the mast sections Eli, 35 to pass against a pulley iii and the pulley 33, from where it extends downwardly through the base i6 and ball and socket support Irl, ll.

Although not shown, it is apparent that the cables 25, i3 and @.8 extend downwardly below the derrick to a suitable operating point where power-operated winches or other means are employed.

Extending from this unshown operating point and upwardly through the ball and socket support ld, li and the base l5 is a cable 5G which extends upwardly through the inner mast section 34 to pass over a sheave 5l in the upper end of the inner mast section. The cable 50 passes outwardly through an opening in the mastsection at this point and then downwardly between the mast sections to connect to an anchor 52 on the inside of the lower portion of the outer mast section 35.

At this point, it would be well to consider the speciiic construction of the inner and outer mast sections. While it is entirely feasible to construct the sections out of steel beams, spreaders and various bracing elements, it has been found practicable for the purpose of the present invention to construct the mast sections of sheet metal, welding these sections together and in a form clearly shown in thedrawings. In welding the sheets o metal of the inner mast section or otherwise constructing this inner section, it is preferable that longitudinally extending enlargements 53, 53 be provided at a pair of the corners and flanges 54, 54 at the remaining corners, these enlargements and flanges being outstanding in such a manner that the side walls of the inner section do not contact the side walls of the outer section. Due to the width of the flanges 54, 55, a substantially wide passageway 55 results between the opposed side portions of the inner and outer sections to serve as a passageway for the cables 48, 59.

A loop 56 is provided on the lower portion of the inner mast section d@ to be used with a pull stick (not shown).

At the lower end of the outer mast 35 is, a pair the sheave 42,Y

of oppositely disposed loops 51, 51, to receive supporting timbers 59, for purposes presently to be explained.

In the operation of the derrick, it can be seen that the cable 43 is employed for moving the boom upwardly or allowing the same to lower. The cable' takes care of the lifting and lowering of a load regardless of the position ol the boom i9. As before stated, both of these cables extend downwardly below the derrick and are controlled by power Winches or the like (not shown).

The cable 5l! extends upwardly and through the upper portion of the inner mast section 34 and downwardly to the lower portion of the outer mast section and when operated serves to elevate the outer mast section to the next floor level, as shown in Figure 2. The remaining cable 48 extends upwardly from a power winch or the like (not shown) through the base I5 and upwardly through the channelway 55 between the mast sections to pass over the pulley 4l and attach to the upper end of the inner section 34, and when operated serves to elevate the inner section S along with the boom I9 to the new position which has been established by the outer mast section 35.

More specifically stated, the outer mast section 35 is elevated from the position shown in Figure l when it is desired to jump the derrick from one level upwardly to another. When the outer mast section 35 has been elevated above the new oor level, a crib will be built and the timbers 59 inserted through the loops 51 to support said mast section in place thereon. This lifting of the outer section takes place as the guy lines 35 are released and upon establishment of the outer mast section in its new location, the guy lines are xed and the inner mast section along with the boom le are lifted to the new location by power exerted on the cable 4B. Obviously, when the inner mast section and the boom have been elevated to the new location. the plates it, Ell can be secured in the same manner as they were secured in place on the construction girders 6 of the underlying floor level.

As shown in Figures S and '7, the aforesaid crib is made up of crossed. timbers 58, 58a, laid on parallel structural elements l of the upper floor level. When in place, the outer mast section 35 is supported on the uppermost cribbingtimbers 58a, by the timbers 59 engaged through the loops 5l, substantially as shown. In elevating the inner mast section 34, the supporting timbers 9 are first detached from the plates l0 and thereafter are placed in position on the structural elements 'l for the securement of the plates l0 thereto, as in the rst instance, as soon as the base structure of the derrick is elevated to clear the structural elements 1.

While the foregoing specification sets forth the invention in specic terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed.

Having described the invention, what is claimed as new is:

l. The method of elevating a derrick having a two-part extensible mast from one floor level to another on a building construction, said mast including a boom, which consists in elevating one portion of the extensible mast above a next adjacent floor level, anchoring the elevated portion of the mast, then elevating the remaining portion of the mast and the boom by aid of the anchored elevated portion to the new position, and thereafter securing the last-mentioned portion of the mast and boom in the new position.

2. A derrick of the character described comprising a base, means for temporarily supporting the base on one iioor level of a building construction, a mast rising from the base, said mast consisting of a pair of sections, one secured to the base and the other extensible on the first-mentioned section, a boom swingably supported on the base, a cable for elevating and lowering the extensible section, means for temporarily supporting the extensible section in the next adjacent oor level, a second cable for operating the boom, a material handling element mounted on the free end of the boom, and a. third cable for operating the elementx said base having an opening therein through which the cables depend to an operating point.

3. A derrick of the character described comprising a base, means for removably securing the base on one floor level of a building construction, a mast raising from the base, said mast consisting of a pair of sections, one secured to the base and the other extensible on the iirst-mentioned section, a boom swingably supporting on the base, means for elevating and lowering the extensible section, means extending from the upper end of the extensible section for actuating the boom, and means for the temporary extensible section to an overlying floor structure to allow for movement of the rst mentioned section relatively thereto.

4. A derrick of the character described comprising a base, means for temporarily securing the base on one floor level of a building construction, a mast rising from the base, said mast consisting of a pair of sections, one secured to the base and the other extensible on the rst-mentioned section, a boom swingably supported on the base, means for elevating and lowering the extensible section, means for its temporary securement to an over-lying door level structure, and a hoist line trained over a pulley on the extensible section and connected to the inst-mentioned section for elevating the same and said boom to elevated anchored position of the extensible section.

5. A derrick of the character described comprising a base, means for removably securing the securement o1 the base on one floor level of a building construction, a mast rising from the base', said mast consisting of a pair of sections, one secured to the base and the other extensible on the rst-mentioned section, a boom swingably supported on the base, cables for controlling the extensible section and said boom, a ball carried at the lower side of a supporting plate below said base and removably secured to parallel timbers adapted to span oor level structural elements, and a socket formed centrally in said plate to receive said ball, said ball and the socket having a lined opening for the passage of said cables downwardly therethrough for manipulation.

6. A derrick of the character described comprising a mast constructed of a pair of telescopic sections, a base on which one of the sections is mounted, means for removably securing the base on one floor level of a building construction, a boom swingable on the base, control cables for lifting the upper-mast section on the lower-mast section, a second means for pulling the lowermast section to a position established by the upper-extended mast section, means for temporarily supporting the upper-mast section on the next adjacent iloor level, means extending from the top of the upper-mast section for actuating the boom, said telescopic sections being spaced apart to dene a passageway for said cables to depend therethrough for manipulation from a point below the derrick, and means on the lower-side of said base for securing the derrick to timbers adapted to span floor-level structural elements.

RAYMOND O. LIVELY.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 927,680 Roberts July 13, 1909 984,670 Heeolwell et al Feb. 21, 1911 1,044,771 Gaskill et al Nov. 19, 1912 1,076,992 Obstler Oct 28, 1913 1,083,277 Gaskill et al Jan. 6, 1914 1,345,304 Zied June 29, 1920 1,956,094 Gadbois Apr. 24, 1934 

